Add braces: don't move EOL comment when if statement is single statement

#KT-28619 Fixed

idea/src/org/jetbrains/kotlin/idea/intentions/AddBracesIntention.kt

@@ -65,8 +65,7 @@ class AddBracesIntention : SelfTargetingIntention<KtElement>(KtElement::class.ja
                 semicolon.delete()
         }
 
-        // Check for single line if expression
-        if (element is KtIfExpression && expression.isInSingleLine() && element.`else` == null) {
+        if (element is KtIfExpression) {
             // Check if a comment is actually underneath (\n) the expression
             val allElements = element.siblings(withItself = false).filterIsInstance<PsiElement>()
             val sibling = allElements.firstOrNull { it is PsiComment }

idea/testData/intentions/addBraces/addBracesForSingleStatementElseWithCommentBeneath.kt

@@ -0,0 +1,10 @@
+fun test(b: Boolean) {
+    if (b) foo(0)
+    else<caret>
+        while (true) {
+            foo(1)
+        }
+    // comment about call below
+}
+
+fun foo(i: Int) {}

idea/testData/intentions/addBraces/addBracesForSingleStatementElseWithCommentBeneath.kt.after

@@ -0,0 +1,11 @@
+fun test(b: Boolean) {
+    if (b) foo(0)
+    else {
+        while (true) {
+            foo(1)
+        }
+    }
+    // comment about call below
+}
+
+fun foo(i: Int) {}

idea/testData/intentions/addBraces/addBracesForSingleStatementIfWithCommentBeneath.kt

@@ -0,0 +1,10 @@
+fun test() {
+    if (false)<caret>
+        while (true) {
+            foo(1)
+        }
+    //comment about foo(2)
+    foo(2)
+}
+
+fun foo(i: Int) {}

idea/testData/intentions/addBraces/addBracesForSingleStatementIfWithCommentBeneath.kt.after

@@ -0,0 +1,11 @@
+fun test() {
+    if (false) {
+        while (true) {
+            foo(1)
+        }
+    }
+    //comment about foo(2)
+    foo(2)
+}
+
+fun foo(i: Int) {}

idea/testData/intentions/addBraces/addBracesForSingleStatementIfWithCommentBeneath2.kt

@@ -0,0 +1,9 @@
+fun test() {
+    if (false)<caret>
+        while (true)
+            foo(1)
+    //comment about foo(2)
+    foo(2)
+}
+
+fun foo(i: Int) {}

idea/testData/intentions/addBraces/addBracesForSingleStatementIfWithCommentBeneath2.kt.after

@@ -0,0 +1,10 @@
+fun test() {
+    if (false) {
+        while (true)
+            foo(1)
+    }
+    //comment about foo(2)
+    foo(2)
+}
+
+fun foo(i: Int) {}

idea/tests/org/jetbrains/kotlin/idea/intentions/IntentionTestGenerated.java

@@ -721,6 +721,21 @@ public class IntentionTestGenerated extends AbstractIntentionTest {
             runTest("idea/testData/intentions/addBraces/addBracesForSingleLineIfWithCommentBeneath3.kt");
         }
 
+        @TestMetadata("addBracesForSingleStatementElseWithCommentBeneath.kt")
+        public void testAddBracesForSingleStatementElseWithCommentBeneath() throws Exception {
+            runTest("idea/testData/intentions/addBraces/addBracesForSingleStatementElseWithCommentBeneath.kt");
+        }
+
+        @TestMetadata("addBracesForSingleStatementIfWithCommentBeneath.kt")
+        public void testAddBracesForSingleStatementIfWithCommentBeneath() throws Exception {
+            runTest("idea/testData/intentions/addBraces/addBracesForSingleStatementIfWithCommentBeneath.kt");
+        }
+
+        @TestMetadata("addBracesForSingleStatementIfWithCommentBeneath2.kt")
+        public void testAddBracesForSingleStatementIfWithCommentBeneath2() throws Exception {
+            runTest("idea/testData/intentions/addBraces/addBracesForSingleStatementIfWithCommentBeneath2.kt");
+        }
+
         @TestMetadata("addBracesForWhile.kt")
         public void testAddBracesForWhile() throws Exception {
             runTest("idea/testData/intentions/addBraces/addBracesForWhile.kt");